Are you trying to suggest that these elite troops are issued whatever they can afford and this guy is wearing addidas shoes because the budget ran out?
Because I have seen pictures from Afghanistan showing special force troops wearing all sorts of footwear. Were there budget problems then too?
Perhaps we could deduce that the fact that only one person is wearing these shoes is because they have the choice to wear what they want and in giving them the choice they are able to get the best gear that suits them personally? Wouldn't that be better than issuing the most expensive gear and forcing them to wear it?